Electric valve-grinder.



H. c. NEWMAN. ELECTRIC VALVE GRINDER.

APPLICATION H LED NOV. 23. I916.

1,21 9,142, itented Mar. 13, 1917.

INVENTOR #GMwm A TTORNEYS STATES PATENT 'oF IIoE.

HARRY G. NEWMAN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR F ONE-HALF T0LOREN 0 GL'AMPI'DT, 0!? LOS ANGELES, CALIFORNIA.

ELECTRIC VALVE-GRINDER.

Specification of Letters Patent.

Application filed Nov-ember 23, 1916. Serial No. menu.

To all whom it may concern:

Be 't known-that I, I-Iauuv C. Newman, a

1 citizenof the United States,,and a resident u of. Los Angeles,.in'thecounty of Los Angeles and Stateof California, have invented a new andImproved Electric Valve-Grinder;

of which the following is a full, clear, and

exact description.

This invention rela tess-"to an electrically X driven tool for grindingvalves.

i as to automatically impart a partial turn to the valve while the 'sameis, seated, lift the valve and impart a shorter backward turn .while thevalve is lifted, and indefinitely repeat-its cycle. until the valve isproperly ground and the tool removed.

With such objects in view,- and others which will appear as the'descri'ption proce'eds, the invention comprises various novel featuresofconstruction and arrangement of arts which "willbe set forth withparticuarity in" the following description and claians ifipended hereto.I

In the' accom anying drawing, which illustrates one en 1 odiment of theinvention jwherein gs rnilar characters of reference indicatecorrespondin parts in all the views,

wa'rdly. Carried by the. guide 3 is a tool rest in the form of a basering 7 encircling the spindle, and upwardly converging spoke members 8conneci the ring with the hub member 9 which slidahly fits around theguide 3 to which t1 1e hub is adjustably fastened by a set-s'crew 10. Bythis means the tool rest can be adj .isted upwardly or downwardlyaccording to the depth of the valve within the engine, it beingunderstood that the base ring rests on the cylinder or finale of theengine while the tool is in operation.

ithin the bod l of the tool is a suit able motor 11 cal-r ed by asupporting -plate 12. The armature shaft '13 of the motor has a ol-11114 which n eshes with a worm wheel 15 on a horizontal shaft 16. Thisshaft has separate mutilated gears 17 and 18 winch areadapted to mes :iwith and rotate a large bevel gear 19 which is feathered to thespindle 1. The gear 17 has a quarterotits circuu'lference prodded withgear teeth, as shown in Fig. 4, while]; the gear 18 has three-quartersofii s circumference provided with teeth, as shown in Fig. 5, and thesegears are disposed at opposite sides of the center of the large, gear19; so that the r earl8 will move the spindle 1 three-(plan ters'of aturn folwardly. and the gear 1| will move the spindle. (me-quarter of aturn rearwardly. Only the forward.movement of the spindle 1 is usedduring the grinding of the valve and its seat, and the retracing action,due to the gear 17,-

takes place while the valve is raised oli' Figure 1 is acentra verticalsection of the its seat. To per: iit the valve to raise, a 19 f Ucam-actuatedliftar 20 ,is employed. This Fig. 2 is avertical section onthe line 2-2, 'comprisesan oscillatory member journaled on a horizontalshaft 21, andthe-lifter has jifi tt is a' erspective view or the spindledrawing-1 designates a jts lower end a suitable 4 .indlewhi ch'has b tfffi as his] ind rbiltltali'lyiind longitudinally movalgfe in a thbularfuidforinin gp'art of the frame or body. of the-tool.

e valve bet-ground.

, justed thatit spindle while the latter is being turned U sifarm 22which :xtends over the shaft 16 and adapted to be actlr'ted by a cam'2-3on theshaft 16. lhe lifter has a lower arm 24 provid' ed with a. fork 25which engages rearwa-rdly by the gear 17. It-is'Ito' beam- 'derstoodtha-t the valve willr-bgs lifted by ts own spring; 'the tensionQilrwhiclf is l Jthan the tension ithe-spring 6"; so that tvhen thelifter SOY is doomiche age .tpindl'eor stem 1 is a'eollar 5"'-betweenwhich, will press the jva] 've' fi irmly fgainstllgiidthelower'endof-the 1ide;-3 isahelicii1 during'the grindin action.4W1 the se ew seem th 6' which ,4 e Spindle down; ii i tool rest on themotor eugaglre the. hit 2 with moving: the same axially-e a ram foractuthe, valve, hold the tool stenry by the handie 27 ainllturn on therurrrnt so that the mot r \rill he drirrin This produces-an intermittentrotaryimotiol'rof the valve. in one dirertion with anflunk-mating and ashort hark-'- n-ard'movementhi-tween each forward step, \\'hureh theralre and its. seat will he uniformly ground.

hro'm the foregoing description taken ll .ronneetiou '[i'll thearron'ipanymg draw iiig..tl-uadvantages of the eonstruotion and methodof operation will he readily understood hr [llUHl skilled in the art towhich the invention nppertains and while 1 have described the principleof operation, to gethrr with he derioe. which I no consider to lll theheat emhodiment thereof, I desire to have it amtlersttmd that thedevice. shown is merely illustrative'and that surh changes may he madewhen desired as fall within the scope of the appended claims.

Haring th ns described my invention, I claim' as new -and desire tosecure by Letters Patent: e 1.'A valve/grinder comprisin" a supp-mtinhody, a rotary and axially movable ive-turning spindle, z -gearconnected with the. spindle, mutilated gear arrangeil to alternatelymesh with the gear to impart rotary motion lILOPpOSilO dire'ctions, alifter operatirely connected with the spindle for atiug tlirllilt'rr.and means: for simultaneously rotating the nmtila'ted gears and ram.

2. A ralre griluh r romprising a supporting body a rotary and nxialtrmoralilv. mire-turning spindle, a gear vonnu ted rith thespindle.coaxial nuu ilalod gears arranged to alternately mesh with thegear toimpart rotiuy motion in opposite direetioma a litter operatlreleounrrted with the spindle for moving the same'axially. a ram lu'ratedhelween the mutilated gears for a'et'uatingz; the litter, and a motormounted on the body and operatirely ronnerted with the ram and inn--tilated gears for rotating tho same simultaueously.

'8. A. valve grinding tool con'iprising a ma a hit-rarrying spindle, agear feathered to the. spindle. mutilated gwirs'ar'lapted to mesh withthe first-inmitimnal gear for morim the same forwardi a h-tfl Ste 1 andhack ardly a shorter step, a shaft car rying the mntilated gear, a earnon the shaft, a lifter operatively connected with the spindle andactuated by the cam for 'lifting the spindle, a spring yieldingly oppos'ing the lifting movement of the spindle. and a motor carried by the bodyand ope-rative'ly connected with the said shaft for turning the smile. i

HARRY 0, NEWMAN

